Well-bailer.



L. L. RICHARD.

WELL BAILER.

APPLICATION FILED DEC. 24. I914- Pa'tented Nov. 16, 1915.

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LEROY RICHARD, OF COALINGA, CALIFORNIA, ASSIGNOR OF QNE-I-IALF TO SAMUEL ALLEN GUIBERSON, JR., OF SAN FRANCISCO, CALIFORNIA.

VTEIIL-BAILER.

citizen of the United States, residing at Coalinga, in the county of Fresno and State of California, have invented certain new and useful Improvements in Well-Bailers, of

' which the following is a specification.

My invention relatesto that class of wellbailers in which'a pipe, cylinder or barrel is providedat its foot or bottom with an ad-' mission check valve and a dart in connection therewith, to control the entrance, retention and discharge of the material to be bailed. The object of my inventionis to provide a simple and effective bailer of this class; and to this end my invention consists in the novel well-bailer which I shall hereinafter fully describe by reference to the accompanying drawings, in which Figure 1 is an elevation of my well-bailer, the barrel being broken. Fig.2 is'a vertical sectional view, enlarged, of the lower endor bottom of the same. Fig. 3 is a cross section on the line w-00 of Fig. 2. Fig. 4 is a cross section on the line 'yg of Fig. 2. Fig. 5 is a bottom View of the bailer. I

1 is the body-pipe, cylinder or barrel of the bailer having at its top the bail or link 2 for the attachment of the sand-line. To the lower end ofthe pipe or barrel 1 is fitted in any suitable manner the hollow stock or shell 3 of the bailer-bottom. It is here shown as being screwed in at 4 up to a shoulder 5. The stock 3 at its lower end lies below the barrel 1 and this portion is concaved to form a shoe 6 which may; assist in cutting into and loosening up the sand. It also serves to better direct the sand into the bailer. The stock 3 is formed on its inside with a seat 7 for a ball-valve 8.

9 is the sand-dart. This may assume any form adapted to penetrate the sand and by rotation on its axis to loosen said sand. In its best form the dart is, as here shown, a short section of an auger. The stem 10 of the dart passes through andvslides freely in the ball-valve 8. The amount of this movement is defined on the up stroke by a shoulder 11 on the stem, which forms a close joint in a corresponding seat 12 in the bottom of the ball-valve, and on the down movement by a shoulder 13 on the stem which forms a close joint in a corresponding seat 14 in the top of the ball-valve. For constructive purposes the upper shoulder 13 Specification of Letters Patent.

Application filed December 24, 1914i Serial No. 878,837.;

Patented Nov.- 16, 19l5.

is best formed by a union 15 which connects theupper section 10 of the stem with the lower section.

The upper end of the stock 3 is cut out to form opposing ears 16 between which is fitted a cross bar 17 carrying at its middle a nut 18. The upper section 10 of the stem 10 is fitted through this nut with a thread 19 of great or long pitch, as shown. The upper end of the stem section 10 is formed or provided with a head 20 of any suitable character adapted to loosen the sand.

The use and advantages of my bailer will now be described, in connection with the removalof sand from a well.

Sand will sometimes, under the inrush of gas. or oil, heave up in the well several hundred feet and form a bridge. To try to break this bridge with a big and heavy string of drilling tools, will result, especially if water be present, in making .the sand pack tighter, or it may break the casing-pipe or it may part the sections of the casing string. The use of drilling tools for this purpose is obviated by my bailer. Again sand may get into the well through the perforations in the casing and form a body therein, say, 100 feet high, to the level of the top perforations. It packs and fills the hole and the ordinary sand-pump will not lift it. If the drilling tools he used to lighten it up, they are apt to break or spreadthe pipe, already weakened by the perforations. In this case, also, my bailer is intended to obviate the use of such tools.

When either a sand bridge or a pack of sand occurs, the drilling tools are lifted out ofthe hole, and my bailer is attached to the sand line and lowered into the well. In descending, the dart 9 hangs low by gravity and the upper shoulder 13 of its stem pressing on the ball-valve 8 holds said valve to its seat 7, as is shown in Fig. 1. lVhen the dart reaches the surface of the sand its descent is arrested, but the combined stock 3 and barrel 1 continuing their descent carry. the nut 18 down the cork-screw like thread 19 of the dart stem section 10', the result of this relative lineal motion being that relative-opposite axial rotation is imparted to the dart and the stock and barrel; and as the stock and barrel are much heavier than the dart and not so free to rotate,'it follows that the rotation of the stock and barrel is a rotation of the dart on its axis, it follows that an auger-like form of said dart, such as I have shown, is of great advantage, in that both 1ts penetration and its agitatmg qualities are of the best.

The feature of the ball-valve being freely slidable upon the dart stem instead of, as is common in bailers of this class, being rigid on said stem, is ofadvantage in that the dart may be rotated repeatedly through a movement short of effecting contact of the lower shoulder 11 with the'valve, and, thel'efore, allowing the valve to remain closed until a sufiiclent volume of sand 1s loosened to- Warrant 1ts passage into the barrel,

whereupon a further or more pronounceddrop will effect the opening of the valve by the contact of the shoulder 11 therewith, and the charge will enter. Less sand will, therefore, drop back, than would fall out if the valve were rigid on the dart stem and thus forcedopen at each movement of the dart.

When the bailer is full of sand it is lifted; and the Weight of the dart and its stem will more positively effect, than will gravity alone, the seating of the valve by the contact therewith of the .upper stem shoulder 13. When the bailer reaches the surface, it is swung over into a box to dump its load.

This is done by allowing its dart to strike the bottom of th box, thereby lifting the valve. In my baiier, this dumping is facilitated by the turning of the dart stem on its axis, due to its contact with the bottom of the box, so that the head 20 of the stem, working in the possibly packed sand within the bailer barrel, loosens it and thereby provides for its easv discharge. Iclaim:

1. A well-bailer comprising a barrel having an admission check valve in its bottom;

a dart projecting from and carried by the barrel bottom; and means dependent upon a relative lineal movement of the barrel and dart for rotating said dart on its axis.

2. A well-bailencomp'rising a barrel having an admission check valve in its bottom;

an auger-like dart projecting from and carried by .the barrel bottom; and means dependent upon a relative lineal movement of the barrel and dart for rotating said dart on its axis.

3. A Well-bailer comprising a barrel having an admission check valve in its bottom; a dart projecting from the barrel bottom and having a stem passing into the barrel and slidable therein; and means dependent upon a. relative lineal movement of the barrel and dart stem for rotating said dart on its axis.

4. A well-bailer comprising a barrel having an admission check valve in its bottom; a dart projecting from the barrel bottom and having a stem passing into the barrel and slidable therein;'and means dependent upon a relative lineal movement of the barrel and dart stem for rotating said dart on its axis,-consisting of a fixed nut within the barrel bottom and a thread on the dart stem engaging said nut.

5. A well-bailer comprising a barrel having an admission check valve in its bottom; a dartprojecting from the barrel bottom and having a stem coacting with the valve to open and close said bottom; and means dependent upon a relative lineal movement of the barrel and dart stem for rotating said dart on its axis.

6. A well-bailer comprising a barrel having an admission check valve in its bottom; an auger-like dart projecting from the barrel bottom and having a stem coacting with the valve to openand close said bottom; and means dependent upon a relative lineal movement of the barrel and dart stem for rotating said dart on its axis.

7. A well-bailer comprising a barrel"having an admission check valve in its bottom; a dart projecting from the barrel bottom and having a stem passing into the barrel and coacting with the valve to open and close said bottom; a fixed nut; and a thread on the dart stem engaging said nut, to rotate the dart upon its axis upon relative lineal movement of the barrel and dart stem.

8. A well-bailer comprising a barrel having an admission check valve in its bottom: an auger-like dart projecting from the barrel bottom and having a. stem passing into the barrel and coacting with the valve to open and close said bottom; a fixed nut; and a thread on the dart stem engaging said nut, to rotate the dart upon its axis upon relative lineal movement of the barrel and dart stem;

9. A well-bailer comprising a barrel havinga valve seat in its bottom; an admission check valve for said seat; a dart projecting from the barrel bottom and having a stem passing into the barrel and slidable freely through the valve; upper and lower shoulders on the stem acting on the valve to close and open it; and means dependent upon a relative lineal movement of the barrel and dart stem for rotating said dart on its axis.

10. A well-bailer comprising a barrel having a valve seat in its bottom; an admission check valve for said seat; an auger-like dart projecting from the barrel bottom and having a stem passing into the barrel and slidable freely through the valve; upper and lower shoulders on the stem acting on the all) valve to close and open it; and means dependent upon a relative lineal movement of the barrel and dart stem for rotating said dart on its axis. v

11. A well-bailer comprising a barrel having a valve seat in its bottom; an admission check valve for said seat; a dart projecting from the barrel bottom and having a stem passing into the barrel and'slidable through the valve; upper and lower shoulders on the stem acting on the valveto close and open it; and means dependent upon a relative lineal movement of the barrel and dart stem for rotating said dart on its axis, consisting of a fixed nut, and a thread on the dart stem engaging said nut.

12. A well-bailer comprising a barrel having a valve seat in'its bottom; an admission check valve for said seat; an auger-like dart projecting from the barrel bottom and having a stem passing into the barrel and slidable freely through the valve; upper and lower shoulders on the stem acting on the valve to close and open it; and means dependent upon a relative lineal movement of the barrel and dart stem for rotating said dart on'its axis, consisting of a fixed nut, and a thread on the dart stem engaging said nut.

13. A well-bailer comprising a barrel haw ing an admission check valve in its bottom; a dart projecting from the barrel bottom and having a stem passing into the barrel and coacting with the valve to open and close said bottom; a stirring head on the upper end of the dart-stem; and means dependgnt upon a relative lineal movement of the barrel and dart-stein for rotating the latter on its axis.

1-1. A well-bailer comprising a barrel; a hollow stock fitted to the lower end of the barrel, said stock having within it a valveseat; an admission check valve for said seat; adart projecting from the lower end of the stock and having a stem passing into said stock and freely slidable through the valve;

upper and lower shoulders on the stem acting on the valve to close and open it; a fixed nut carried by the upper end of the stock;.

and-a thread on the dart-stem engaging. said nut to rotate the dart upon its axis upon a relative lineal movement of the stock and dart-stem.

15. A well-bailer comprising a barrel; a hollow stock fitted to the lower end of the barrel, said stock having a concaved shoe projecting from the barrel and having also an interior valve-seat; an admission check valve for said seat; a dart projecting from the lower end of the stock and having a stem passing into said stock and freely slida able through the valve; upper and lower shoulders on the stem acting on the valve to close and open it; a fixed nut carried by the upper end of the stock; and a thread on the dart-stem engaging said nut to rotate the dart upon its axis upon a relative lineal movement of the stock and dart-stem.

16. A. well-bailer comprising a barrel; a hollow stock fitted to the lower end of the barrel, said stock having a concaved shoe projecting from the barrel and having also an interior valve-seat; an admission check valve for said seat; a dart projectingfrom thelower end of the stock and having a stem passing into said stock and freely slidable through the valve; upper and lower shoulders on the stem acting on the valve to close and open it; a stirring head on the upper end of the dart-stem; a fixed nut carried by the upper end of the stock; and a thread on the dart-stem engaging said nut to rotate the dart upon its axis upon a relative lineal movement of the stock and dart-stem.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LEROY L. RICHARD.

Witnesses:

B. L. THILLIE W. H. SATCHELL. 

